László Bíró (1899)

Frustrated by the way his fountain pen’s sharp tip would tear paper and by the amount of time he wasted filling the pen with ink and cleaning up smudges, László Bíró set to work developing a better pen. A Hungarian newspaper editor, he noticed that the ink used in newspaper printing dried quickly and without smudging, but it was too viscous for use with existing pens. With the help of his brother, a chemist, he developed the modern ballpoint pen. How long did it take him to build his pen? Discuss

Source: The Free Dictionary

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